/****************************************************************************
**
** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtCore module of the Qt Toolkit.
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** GNU Lesser General Public License Usage
** This file may be used under the terms of the GNU Lesser General Public
** License version 2.1 as published by the Free Software Foundation and
** appearing in the file LICENSE.LGPL included in the packaging of this
** file. Please review the following information to ensure the GNU Lesser
** General Public License version 2.1 requirements will be met:
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU General
** Public License version 3.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of this
** file. Please review the following information to ensure the GNU General
** Public License version 3.0 requirements will be met:
** http://www.gnu.org/copyleft/gpl.html.
**
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** Alternatively, this file may be used in accordance with the terms and
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** $QT_END_LICENSE$
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****************************************************************************/

#ifndef QABSTRACTSTATE_H
#define QABSTRACTSTATE_H

#include <QtCore/qobject.h>

QT_BEGIN_HEADER

QT_BEGIN_NAMESPACE

QT_MODULE(Core)

#ifndef QT_NO_STATEMACHINE

class QState;
class QStateMachine;

class QAbstractStatePrivate;
class Q_CORE_EXPORT QAbstractState : public QObject
{
    Q_OBJECT
public:
    ~QAbstractState();

    QState *parentState() const;
    QStateMachine *machine() const;

Q_SIGNALS:
#if !defined(Q_MOC_RUN) && !defined(qdoc)
private: // can only be emitted by QAbstractState
#endif
    void entered();
    void exited();

protected:
    QAbstractState(QState *parent = 0);

    virtual void onEntry(QEvent *event) = 0;
    virtual void onExit(QEvent *event) = 0;

    bool event(QEvent *e);

protected:
    QAbstractState(QAbstractStatePrivate &dd, QState *parent);

private:
    Q_DISABLE_COPY(QAbstractState)
    Q_DECLARE_PRIVATE(QAbstractState)
};

#endif //QT_NO_STATEMACHINE

QT_END_NAMESPACE

QT_END_HEADER

#endif
